javascript - CodeSandbox 出现 Material-UI 错误 : undefined is not an object (evaluating '_context$muiTheme.borderRadius' )

Question

我正在尝试在 CodeSandbox 上测试 Material-UI 组件。并不断收到错误:

TypeError undefined is not an object (evaluating '_context$muiTheme.borderRadius')

我做错了什么？

Answer 1

The solution是从 Material UI 导入此元素:

import getMuiTheme from 'material-ui/styles/getMuiTheme'
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider'

并用它们包装应用程序:

render(<MuiThemeProvider muiTheme={getMuiTheme()}><App /></MuiThemeProvider>, document.getElementById('root'));

没有它们，我们就无法从 Material UI 获得任何样式，没有它们，Material UI 就无法工作。

这是正确的实现: https://codesandbox.io/s/l9v5q2548z